Abstract

We report highly resistive strongly ferromagnetic strained thin films of (BFMO) grown on (001) substrates using pulsed laser deposition. The films are tetragonal with high epitaxial quality and phase-purity. The magnetic moment and coercivity values at room temperature are 90 emu/cc (-site ion) at and 274 Oe, respectively. The magnetic transition temperature is strongly enhanced up to , which is higher than for pure bulk . Strained BFMO is a potential room temperature spin filter material for magnetic tunnel devices.

Received 24 June 2010Accepted 20 December 2010Published online 06 January 2011

Acknowledgments:

J.L.M.-D. would like to thank EPSRC (Grant No. EP/E058078) and the ERC (Grant No. ERC-2009-AdG 247276 NOVOX) for supporting this work. S.P. acknowledges the Commonwealth scholarship fund. E.-M.C. was supported by the National Research Foundation of Korea Grant funded by the Korean Government (Grant No. NRF-2009-352-C0025). H.W. would like to thank the U.S. National Science Foundation (Ceramic Program, Grant Nos. NSF-0709831 and 1007969). Q.X.J. and J.L.M.-D. acknowledge the support of the U.S. Department of Energy through the LANL/LDRD program and the Center for Integrated Nanotechnologies (CINT) for this work.